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| author | Jeff Johnston <jjohnstn@redhat.com> | 2006-02-07 18:44:54 +0000 |
|---|---|---|
| committer | Jeff Johnston <jjohnstn@redhat.com> | 2006-02-07 18:44:54 +0000 |
| commit | 9bbe6d5d283de104216238d684e0a46506326706 (patch) | |
| tree | be201e8f20488b3c81392d55d2337acd4948b25f /newlib/libc/sys/arm/crt0.S | |
| parent | 03a49a00ab2239e769c61592ea946d151ea95114 (diff) | |
| download | cygnal-9bbe6d5d283de104216238d684e0a46506326706.tar.gz cygnal-9bbe6d5d283de104216238d684e0a46506326706.tar.bz2 cygnal-9bbe6d5d283de104216238d684e0a46506326706.zip | |
2006-02-07 Paul Brook <paul@codesourcery.com>
* libc/machine/arm/setjmp.S: Add Thumb-2 support.
* libc/sys/arm/crt0.S: Add Thumb-2 startup code.
* libc/sys/arm/libcfunc.c (do_AngelSWI): Use AngelSWIInsn.
* libc/sys/arm/swi.h (AngelSWIInsn, AngelSWIAsm): Define.
* libc/sys/arm/trap.S: Disable for Thumb-2.
Diffstat (limited to 'newlib/libc/sys/arm/crt0.S')
| -rw-r--r-- | newlib/libc/sys/arm/crt0.S | 38 |
1 files changed, 27 insertions, 11 deletions
diff --git a/newlib/libc/sys/arm/crt0.S b/newlib/libc/sys/arm/crt0.S index 8a8372a88..c750ca819 100644 --- a/newlib/libc/sys/arm/crt0.S +++ b/newlib/libc/sys/arm/crt0.S @@ -18,15 +18,26 @@ /* .text is used instead of .section .text so it works with arm-aout too. */ .text +#if defined(__thumb2__) + .syntax unified + .thumb +.macro FUNC_START name + .global \name + .thumb_func +\name: +.endm +#else .code 32 +.macro FUNC_START name + .global \name +\name: +.endm +#endif .align 0 - .global _mainCRTStartup - .global _start - .global start -start: -_start: -_mainCRTStartup: + FUNC_START _mainCRTStartup + FUNC_START _start + FUNC_START start #if defined(__ELF__) && !defined(__USING_SJLJ_EXCEPTIONS__) /* Annotation for EABI unwinding tables. */ .fnstart @@ -45,7 +56,12 @@ _mainCRTStartup: /* Issue Angel SWI to read stack info */ mov r0, #AngelSWI_Reason_HeapInfo adr r1, .LC0 /* point at ptr to 4 words to receive data */ - swi AngelSWI_ARM /* We are always in ARM mode for startup */ +#if defined(__thumb2__) + bkpt AngelSWI +#else + /* We are always in ARM mode for startup */ + AngelSWIAsm AngelSWI_ARM +#endif ldr r0, .LC0 /* point at values read */ ldr sp, [r0, #8] ldr sl, [r0, #12] @@ -75,8 +91,8 @@ _mainCRTStartup: sub a3, a3, a1 /* Third arg: length of block */ -#ifdef __thumb__ /* Enter Thumb mode.... */ - +#if defined(__thumb__) && !defined(__thumb2__) + /* Enter Thumb mode.... */ add a4, pc, #1 /* Get the address of the Thumb block */ bx a4 /* Go there and start Thumb decoding */ @@ -100,7 +116,7 @@ __change_mode: #else mov r0, #AngelSWI_Reason_GetCmdLine adr r1, .LC30 /* Space for command line */ - swi AngelSWI + AngelSWIAsm AngelSWI ldr r1, .LC30 #endif /* Parse string at r1 */ @@ -222,7 +238,7 @@ __change_mode: bl FUNCTION (exit) /* Should not return. */ -#ifdef __thumb__ +#if defined(__thumb__) && !defined(__thumb2__) /* Come out of Thumb mode. This code should be redundant. */ mov a4, pc |